False work for concrete constructions.



C. A. HAMMETT.

FALSE WORK FOR CONCRETE CONSTRUCTIONS.

APPLIGATION TILED FEB. 23, 1012. 1,079,045 Patented Nov. 18,1913.

2 SH ETS-S EET 1.

C. A. HAMMETT.

FALSEWORK FOR CONCRETE CONSTRUCTIONS.

APPLIGATION FILED TEB`23,1912. 1,079345. Patented Nov. 18,1913.

2 SHEETS-SHEET 2.

qau-p I,

l CVN/I-/GLAN Zg mrr n sen rirr'ir orric CHARLIZE .A. HAMMETT, QE WASHINGTON. DISTBICT OF COLUMBA.

EAJSE WORK FOB GDNCBETE CONSTEUCTIONS.

To all whom it may conccm Be it known that I, CHAKLES A. HAMMET'L zi citizen of the United States of America, residing at lWashington, District of ,Columhia, have invented certain new and useul Improvements in `False il 'ork for Concrete Constrnctions, of which the ;following s e specificetion.

The inven-tion reletes to e 'false w orl 'for building Construction and more particularly 'to the class of edjusteble knock-down or collepsible 'forms :for composite constructiims.

The primer-y object ot' the invention 'lS the provision oi' e form or mold of this churecter in which e cementitious, plastc or composite foundetion, 'for instence, flooring niey he constructed with :i series of rihs of verious width and depth spaced on Centers, 'to de- Velop the maximum compression area. above 'the neutral nxis. y

Another object .of theinvention is the provision oli' a form or mold in which a single or plurality ot' remnvble lillers muy be placed so as to reglete or (letermine the depth of the ribs in e floor Construction.

t further object of the invention is the provision of e mold or form in which a plurality thereof can he properly and eccu'utely centered with unifprmity and the fillers therein adjusted in various places or planes .to increase or decrease the depth of the ribs in the 'floor Construction.

;li still further object of the invention is the provision of a mold or form in which the sections thereof can be reedily adjusted according to the enea of the floor to be constructed, and on the setting and dryng of the material thereof the said ;forms or sections ;may be conveniently and quickly r,emoved, collapsed or disessenbled.

A still further object of the invention is ;the provision of e mold or form of this chursczter which is simple in Construction, conveniently set up, relieble and efiicient in its purposes and inexpensive in mnnufecture.

,Other objects of the inventioh will he in part Obvious and in part pointed ont hereweiter.

The nvention accordingly consists in the hem -es of .const -uction, comhinatien and elements and arrangement of parte which will be exempl-fied in the constrction here' inrfter set forth and the scope [of the epplication of which will be indiceted in the following claims.

liri the clrwngs :--]E`gure l is e fragmen- Specification of Letters Patent.

Application filed February 23, 1912. SeriaT Ne. 679,53-r.

Pitented Nov. is, 1913.

EISSUE taiv vertical transverse sectionel view through the 'false work const'ucted in accordnnce with the invenlion. Fig. 2 is a vertical lo'gitudinul sectional view ot' the seine. Fig. 3 is a fragmentin-y verti ::il transverse sectionul View similar to Fig. 1, but showing the lillers in dillerent position; Fig. sl is a perspective view ol' the end cup ren'oved. .Fl g. 5 is Similar View of modification. Fig. [3 is e similar View of further modification Fi o. 7 :i similar View of e still further noiificaton. Fig. 8 is a similar view of stil further modification. Fig 9 is ;i similar view ni' a still further modification. Fig. 10 is ;L View of e still 'further modification. ll is e frzgmentery perspective view of one of the fillers removed.

Similar reference characters indicate corresponding paris throughout the several views in the dr wings.

lieferring to the drewings by numerals, the :false work or molds fpr the concretc Construction comprses e plurality of upwerdly arched or bowed elternately ar- -inged :form or mold sections 10 and 11 respectively, prefe-;hly censtrcted from sheet metal, having either flat or vertical corrugeted surfaces, the sections 11 being designed to telcscopc over the cnds ndjecent thei-eto of the sections 10 and serve as intermediate sections, so :s to :fi'ord continuous unb'okcn forms or molds when seid sections have been assembled for the construction of concrete floor-ing in e menner presently described. The sections 10 in the sides thei-ect are provided with vertical slots 12 which open through the free longitudinal edges thereof, the slots being for-med near opposite ends of the said sections` although' they may be located at ;my other point therein, and through which are passed trensversely erranged bolt members 13 adapted for vertical adjustment in the said Slots, end support ndjusteble fillers oomprising inverted lJ-sheped bars 14, preferably constructed from sheet metal aire dependin side flanges 15 on which are formed alining oles receiving the bolt members 13, which have threaded thereon binding or looking nuts 16 for the fastening of the said bars 14 in adjacent position between the sides of the sections lQ and 11 adjecent to each .other. It is of course understqod that the bars 14 may be of any required length es the oc e sion may require. connected with the bot members 13 are the down-turned ends 17 of bracing or spacing rods 18 which prevent the crushing in or the separation of the said sections and also sustain the same'uniformly spaced with respect to each other when the sections are properly positioned for use.

Carried by the bolt members 13 are'closure strips 19 which are designed to bridge the slots 12 to prevent' the cementitious material from leaking through the same when the sections are in assembled relation for the formation of a floor.

Adapted for closing the free open ends of the outermost sections 10 or 11 of a series when assembled are end closure heads or caps 20 made from sheet metal, the same being of a shape corresponding to the cross sectional contour' of the said sections and formed at the top and side edges with inturned right angular tongues 21 between which are provided abutment nibs 22 which respectively engage the inner surfaces and outer edges of said section for the mounting of the heads or caps 20 in closing position as shown in the drawings.

The sections 10 and 11 when assembled and in operative position for the formation of the concrete floor are arranged in parallel rows and are connected and assembled in the manner as heretofore set forth.

In Fig. 5 of the drawings is'shown a modification of filler which comprises a strip 23 preferably constructed from wood having a suitable transverse `opening receiving the bolt 24: which is mounted in the section 10 in an identical manner as the bolt member' 13 so that this strip 23 may be substituted for the filler heretofore described.

in Fig. 6 is shown a further modification of filler which comprises in addition to the strip 26 identical to the strip 23 but serving as a supporting base, a vertically disposed board 27 upon which is superimposed a sofiit strip 28, thus; in this manner, the height or de th of the filler can be increased or decrease it being understood of course that it will be only necessary to vary the depth of the board 27 as will be obvious.

In Fig. 7 of the drawings is shown a still further modification of filler which comprises a solid wood beam 29 which may be of any required depth' and is fastened in place between-the-sides adjacent to eachg other of the sections 10 by means of a yokelike clamp 30 having a binding screw 31 which also tastens the bracing or spacing rods heretofore referred to,

In Figs. 4- and 5 of thedraw'ings the bolt members are non-adjustably mounted in the sections,

lln lFig. 8 is shown a .modification of mold or form which comprises the upwardly arched or bowed sections 32 having at their longitudinal edges inturned e fianges 33 adapted to abut each other as` shown or overlap each other, as shown in Fig. 9 ot' the drawing, to support the filler.

In Fig. 10 of the drawings is shown a further modification of mold or form which comprises an upwardly arched or' bowed section 34 for-med of two parts 35 and 36, the edges thereof at the crown of the section being down turned to provide flanges 37 which are connected by means of detachable fasteners, a single one only being shown and indicated at 38. V

In constructing a concrete floor the false work is employed in the following manner: The sections 10 and 11' are telescoped so as to' form unbroken continuous rows arranged in the same plane with each other and the fillers are inserted between the sides of the sections and fastened in adjust/ed position by means of the bolt members or clamps to which are connected spacng rods as heretofore set forth, the sections -being supported upono temporary josts 39' which are supported in any suitable manner as usual `and poured into the spaces between the sides of the sections lO and 11 is concrete which fills the said spaces and also covers the crowns of said sections to provide the ribs 40.arched hollows 41 therebetween and the floor slab 4:2, the. said ribs being ot any required depth. ltt is of course understood that the depth of the ribs 40 may be increased or decreased according to the adjustment of the fillers between the sdes of the section. By reason of the upw'ardly bowed or arched formaton of the said sections 10 and 11 it enables an increased area of concrete to be formed at the neutral axis of each rib in the floor Construction for ettecting a maximum of strength, rigidity, and efiiciency in the floor. Thiis, it will be seen that hollow tiles may be entirely dispensed with and thereby dispensing with a resulting dead load and at the sametime eti'ecting a considerable saving in the consumpton of concrete material or other cem-- entitious substance when constructing the floor in a manner as heretofore stated. 'The sections 10 and 11 and their adjunct parts when assembled remain in such position until the concrete or like material has become set and hardened, whereupon the same are collapsed or knocked 'down 'for further use, as will be clearly understood.

lln Fig. 8 cit the drawings there is shown a spacer bar comprising two parts 44 and 4:5, respectively, which are connected at their overlapping ends by 'means' of a bolt member 46, the adjacent faces ot the overlappecl ends being provided with interlocking`teeth :7, to prevent slipping of the parts ot the spacer when connected together( From the foregoing description, taken in connection with the accompanying drawings it is thought that the Construction and operation ot the invention will be clearly understood, and therefore, a more extended explanation has been omitted.

What is claimed is 1. A false work for concrete construct-ion comprising rows of arched sections, the sides of each section being provided with Slots, fillers between adjacent-sides of adj acent sections, spacer bars between the sides of each section cover plates extending over said slots and single bolts extendin through the opposed Slots in each of sai sections, said spacer bars, and through said fillers and adjustable cover plates.

2. A false work for concrete construction comprising rows of arched sections the sides of each section being arallel, fillers arranged between the sides of adjacent sections, spacer bars between the respective sides of each section, and single bolts passing transversel through the fillers, &djacent sides of aiusted sections and adjacent ends of respective spacer bars.

In testimony whereof, I atiix my signature in the presence of two witnesses.

CHARLES A. HAMMETT. Witnesses:

ROBERT H. RATBURN, LOUIS O'I'I'ENBERG. 

